"My grandfather, who is an art teacher, commented on how wonderful the works were," she said.

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Sydney gallerist Nicky Ginsberg said on Thursday that the work is ‘‘quite lyrical and spontaneous’’.

‘‘I understand why this child would be considered to be verging on the brilliant,’’ she said, pointing to one painting with a black background on the artist’s website as ‘‘amazing’’.

She recently hosted a Studio Artists in Colour exhibition including adult artists with Down syndrome and autism at her NG Art Gallery in Chippendale, said being ‘‘locked in’’ an autistic world meant such artists were ‘‘bursting with energy’’.

She had purchased one work herself by another boy with autism, attracted to its freshness and simplicity.

Some people with learning disabilities are termed ‘‘outsider artists’’, rather than simply artists, said Ms Ginsberg.

But there was a debate about whether the outsider term celebrated or diminished artists with autism, she said.

It was not only the family who were amazed by his talent, little Vinnie caught the attention of local art gallery owner and curator Troy Williams.

Mr Williams said he discovered Vinnie's ability when a friend told him to look at his paintings on Facebook.

"I didn't realise Vinnie was only two-years-old when I was looking at his works," said Mr Williams, who has seen the toddler in action.

"I liked what I saw and basically decided that I would like to represent the artist and do a show.''

He exhibited his work at C Gallery in Brisbane's Fortitude Valley last week, a show Mr Williams said was very successful.

"He's only got nine paintings left out of 30," he said.

"Also there was a little extra money made from donations at the bar, which was donated to the AEIOU Foundation [for children with autism]. People were astounded that the works were done by a two-year-old because they have so much maturity, composition and fluidity throughout."

Ms Shing has since provided an update on the show, reporting the works sold for about $12,000 in total, with 10 per cent of the profits donated to the AEIOU Foundation.

She said she felt Vinnie was aware of his achievement.

"He seemed to really turn it on that night and has been painting more than usual since," she said.

Correction: The original version of this story misspelled Vinnie's last name as Marcis.